"Clear Receipt Accrual Process" exists in Receipt Accounting Explanation

Summary

need to know the actual business need in order to run process "Clear Receipt Accrual Process"

Content

in receipt accounting in the task list in the Accrual Clearing group there are three requests :

• Clear Receipt Accrual Balances This process clears accrual amount difference between account payable and receipt accounting sub ledgers.
• Manage Accrual Clearing Rules
• Adjust Receipt Accrual Balances Manually adjust or clear accrual balances to inventory valuation for accounts not covered by automatic clearing rules, or reverse such clearing adjustments.

i have a confusion from business and application prespective :

1- why i should run the Clear Receipt Accrual Balances